Generally speaking, Poe had created five detective novels: The Murders in the Rue Morgue, 1941; The Mystery of Marie Roget, 1842; The Purloined Letter, 1845; The Gold- Bug, 184; Thou Art the Man, 1844. The first three constituted the Dupin detective trilogy, which created a unique image—detective Dupin. Although Poe had wrote just a small number of detective novels, the careful reasoning and unique narrating style has been recognized as the precedents of the western mystery novels. Poe created a series of classic detective fiction writing skills and made it a popular literary genre. Although mystery fiction is not a new literary genre, but Poe's narrating style—centering on the crime, cracking the crime by elaborate reasoning, analyzing and solving the case by the wisdom of the characters—is a leading card. The Allan Poe' s Mode, “The amateur detective, the locked-room cases, the approaches of analyzing mystery, the ways of describing killing scenes, and the usage of plain words and lots of conversations. These means, called Allan Poe' s Mode.”  It is followed by many authors afterwards, such as English writers William Collins, Conan Doyle, Agatha Christie and etc. Inspector Quebracho described by Collins in The Moonstone is with similar character of Dupin. Sherlock Holmes created by Conan Doyle is also have much in common with Dupin, and the relation between Holmes and Watson is the inheritance and development of the relation between Dupin and his friend. Poe opened up the creation of detective novel and made great contributions to this field.